Image copyrightReutersImage caption
Greenpeace activists unfurled a giant banner on the Eiffel Tower urging people to resist the rise of the National Front

An opinion poll by the Odoxa Institute for France Info predicted Sunday's election would have the lowest turnout of any second-round presidential vote in France since 1969. The institute reported that far-left voters were particularly unlikely to vote.

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Media captionAn egg was thrown at Marine Le Pen while she was campaigning on Thursday

On Friday the campaign group Greenpeace unfurled a large banner with an anti-FN message from the Eiffel Tower in central Paris.

What happens after Sunday?

Mr Macron and Ms Le Pen came top of the 11 candidates in total who participated in the first round of voting on 23 April.

While the outcome of Sunday's second round should be clear that evening, the results will be officially proclaimed by France's constitutional council on Thursday, 11 May.

Sunday, 14 May, marks the end of outgoing President François Hollande's term, and is the latest possible date for the inauguration and official transfer of power to his successor.

Mr Hollande, of the Socialist Party (PS), chose not to stand for a second five-year term due to his unpopularity.

While Mr Macron served in Mr Hollande's cabinet, he is not a member of the PS and has formed his own political movement, En Marche! (On the move).

You can follow the French election on the BBC News website. Click here for all our latest coverage.

On the day of the election, we will be running a live page bringing together the latest news, video and analysis.

On TV, you can watch a BBC World News Election Special, from 18:30 BST (17:30 GMT / 19:30 local time in France) on Sunday, which will be broadcast on BBC News in the UK and on BBC World News internationally, with Christian Fraser presenting from Paris.

For radio, BBC World Service will broadcast a special extended edition of Newshour from Paris at 18:00 GMT on Sunday.